How can we improve the existing moving creatures of Minecraft? Show us your coolest fantasy creatures. We are very interested in ideas that are unique and not just lists of mobs!

Stone Mobs

Occasionally there should be stone creatures that break stone to get to you, they spawn in the walls and break down the walls to get to you making it almost impossible to trap it. These mobs blend into the stone around the cave making them almost impossible to see, they deal the same amount of damage a zombie can deal.

A pickaxe is more efficient in damaging these enemies because they are made of stone, I have no idea what name this mob would be called, maybe "Stonie"

I don't think a mob that spawns IN the walls of a cave would be smart, unless they spawn with world gen and never respawn. Otherwise they would be impossible to control later in the game and could ruin a player's builds as the continuously spawn and break down walls.